Improvement in wrenches



tiuiml tant HOWARD TILDEN, OF BOSTON,

atwttitm. wir ,a M

MASSACHUSETTS, ASSIGNORl TO IMPROVEMNT IN WRENCHES.

The Schedule referred to in these Letters Patent: and making paxt of the same.

To all whom fit lmay concern:

Be it known that I,- HOWARD Tinnen, of Boston, in the county of Suffolk, and State of Massachusetts, have invented a new and improved Wrench; andv I dov hereby declare that the following is a full, clear, and exact dey scption thereof, which will enable others skilled in the artto make and use the same, reference being had to the accompanying drawings, forming a part of this specifi cation.

v(which is provided with a stationary or fixed jaw) is vvmade of tapering or wedge-form, leaving its narrowest part nearest the fixed jaw, and increasing in width as it recedes from said jaw.

Through this portion of the wrench, in line with the jaw, and edgewise to the wedge, is a slot, of 'a thick ness equal to about one-half that of the body of the wrench.

The movable jaw in its main portion is of the same thickness as the body of the wrench, with a projection of the thickness of and fitting into the slot in which it is moved back' and forth, to accumulate the space between the two jaws to iit any size of nut, as required.

A screw passes from the' back of the wrench through the slot into a nut formed to receive it in the movable jaw The head upon this screw seats itself upon the back of the wedge, bringing the projecting shoulder of the jaw snugly and firmly against the front ofthe wedge and retaining it in position.

Then the wrench is used, the tendency is to force the jaws apart, which presses the head of the screw and the shoulder upon the wedge, and fastens them firmly in position.

Io release and. move the jaw, a slight blow or jar upon the end 'of' the wrench suiiices, when the screw is easily turned and a new adjustment effected. `Figure 1 is a perspective view of the main body of the wrench.

Figure 2, a detached perspective view of the movable jaw, with its fastening-screw.

:Figure 3 is a side view, showing a portion of the body of the wrench broken away and removed, so as to show the central slot with the movable jaw and screw therein, as arranged in position ready for use.

Figure 4, a 'cross-section of the body of the wrench, with a top view of the movable jaw and screw, as ar ranged therein.

Similar letters of reference indicate corresponding parts.

A is the main body of the wrench, consisting of the stationary jaw B, the wedged-shape part C, slot O2, and handle I), all forged or cast in one piece.

E is the movable jaw, having the part F of the same thickness as the stationary jaw B, and its projecting portion G, which enters the slot G2, of? just sufcient thickness to move freely therein and retain it from turning.

His the screw, having a head, a, equal to or slightly exceeding the thickness of thebody of the wrench.

This serewpasses from the back through the slot into a nut formed in the body ofthe movable jaw.

I do not propose to confine myself to the precise form and arrangement here shown, as the same ma be vaof my invention; as, for instance, I may make the screw stationary in the jaw, with a nut to turn upon its back nut "on its front end, or I may form aslot in the movable jaw to pass over the body of the wrench, which would s tll retain its tapering or wedge-form.

"Ihe construction is exceedingly simple, the` parts strong and not liable to derangement, and the facilities for adjustment not exceeded by any form of wrench now made.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is

The combination of the wedge-shaped body O of the wrench with the movable jaw E and tightening-screw H, all made and operating in the manner substantially as herein shown and described;

HOWARD TILDEN. Witnesses:

FRANK BLoomanrr.` WM. A. lyIoBeAN.v

ried in several ways and still retain the main eatures.

end, or pass the screw ieely through the jaw, with a 

